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GATE preparation for Chemical Engineering

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This thread is dedicated to preparation for Chemical Engineering section of GATE. You may share questions related to topics like Process Calculations and Thermodynamics, Engineering Mathematics, Chemical Technology, Instrumentation and Process, Chemical Reaction Engineering, Mass Transfer, Heat Transfer, Fluid Mechanics and Mechanical etc.

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Jo K

Shared from Thermodynamics - 1 on Nov 08, 2025 3:43 PM

The change in entropy of the system undergoing a cyclic irreversible process is

greater than zero

less than zero

equal to zero

equal to the

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Jo K

If the process is cyclic,whether it be reversible or irrversible delta s system =0

If the process is cyclic,whether it be reversible or irrversible delta s system =0 Please type your answer before submitting.

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Pritam Das

Shared from GATE Mock Test - 1 (Chemical Engg.) on Feb 05, 2021 12:58 PM

A unity feedback control system has a forward path transfer function equal to . The unit step response of this system, starting from rest, will have its maximum value at a time equal to

0 s

0.56 s

5.6 s

infinity

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Pritam Das

The laplace transform of the input is not multiplied with the transfer function here. but it should be.

The laplace transform of the input is not multiplied with the transfer function here. but it should be. Please type your answer before submitting.

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Akshay

Posted on Mar 01, 2021 4:03 PM

I think TCY has rectified it.

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Greeshma

Shared from Fluid Mechanics on Aug 21, 2020 8:18 PM

In an orifice meter, if the pressure drop across the orifice is over estimated by 5%, then the percentage error in the measured flow rate is

- 2.47

+ 5

+ 2.47

- 5

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Greeshma

Shouldn't the answer be 2.47 instead of -2.47? The flowrate is obviously directly proportional to the square root of pressure. Hence when pressure in over estimated, the flowrate also increases right? Pleaae correct me if i am wrong.

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Prerna

Posted on Oct 07, 2021 5:44 PM

I think TCY has rectified it.

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Greeshma

Shared from Fluid Mechanics on Aug 18, 2020 6:08 PM

For laminar flow conditions, the relationship between the pressure drop (p_c) across an incompressible filter cake and the specific surface area (S₀) of the particles being filtered is given by which one of the following?

p_c is proportional to S₀

p_c is proportional to 1/ S₀

p_c is proportional to S₀²

p_c is proportional to 1/ S₀²

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Vaishnavi Reddy Kaila

<p>,,</p> Please type your answer before submitting.

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Greeshma

Posted on Jul 20, 2020 9:04 PM

Direction: An ideal gas with molar heat capacity R (where R = 8.3 14 J/mol. K) is compressed adiabatically from 1 bar and 300 K to pressure P₂ in a closed system. The final temperature after compression is 600 K and the mechanical efficiency of compression is 50%.

The work required for compression (in kJ/mol) is

3.74

6.24

7.48

12.47

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Greeshma

Shouldn't the answer be 7.48 kJ/mol? It's given that it is a closed system and adiabatically compression is done. If it was open system, the formula for work done is the one given in the solution. I hope what I told is right. If not, please correct me.

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Roopkaur

Posted on Oct 06, 2021 5:11 PM

I think TCY has rectified it.

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